$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$Predecesso$]],\backslash$table$[[$Time$],[($days$)]],\backslash$table$[[$Earliest$],[$Start$]],\backslash$table$[[$Earliest$],[$Finish$]],\backslash$table$[[$Latest$],[$Start$]],\backslash$table$[[$Latest$],[$Finish$]],$Slack$],[$A$,---,5,0,5,0,5,],[$B$,$A$,8,5,13,5,13,],[$C$,$A$,7,5,12,6,13,],[$D$,---,6,0,6,16,22,],[$E$,$B$,$D$,$C$,8,13,21,13,21,],[$F$,$D$,3,6,9,22,25,],[$G$,$D$,3,6,9,22,25,],[$H$,$E$,4,21,25,21,25,],[$I$,$F$,$G$,$H$,6,25,31,25,31,]]$

Consider the above table and answer the following $2$ questions.

a$.$ What is the slack for each activity listed in the table? Write your answers in the appropriate column.

b$.$ State the critical path.